doc: Add comments and additional reviewers to CODEOWNERS file

Author: adamjonas

CODEOWNERS

@@ -1,25 +1,136 @@
-# Nonspecific maintainers
+# ==============================================================================
+#                          Bitcoin Core CODEOWNERS
+# ==============================================================================
+
+# Configuration of code ownership and review approvals for the bitcoin/bitcoin
+# repo.
+
+# Order is important; the last matching pattern takes the most precedence.
+# More info on how this file works can be found at:
+# https://help.github.com/articles/about-codeowners/
+
+# This file is called CODEOWNERS because it is a magic file for GitHub to
+# automatically suggest reviewers. In this project's case, the names below
+# should be thought of as code reviewers rather than owners. Regular
+# contributors are free to add their names to specific directories or files
+# provided that they are willing to provide a review when automatically
+# assigned.
+
+# Absence from this list should not be interpreted as a discouragement to
+# review a pull request. Peer review is always welcome and is a critical
+# component of the progress of the codebase. Information on peer review
+# guidelines can be found in the CONTRIBUTING.md doc.
+
+
+# Maintainers
 #   @laanwj
 #   @sipa
 #   @fanquake
+#   @jonasschnelli
+#   @marcofalke
+#   @meshcollider
+
+# Docs
+/doc/*[a-zA-Z-].md                          @harding
+/doc/Doxyfile.in                            @fanquake
+/doc/REST-interface.md                      @jonasschnelli
+/doc/benchmarking.md                        @ariard
+/doc/bitcoin-conf.md                        @hebasto
+/doc/build-freebsd.md                       @fanquake
+/doc/build-netbsd.md                        @fanquake
+/doc/build-openbsd.md                       @laanwj
+/doc/build-osx.md                           @fanquake
+/doc/build-unix.md                          @laanwj
+/doc/build-windows.md                       @sipsorcery
+/doc/dependencies.md                        @fanquake
+/doc/developer-notes.md                     @laanwj
+/doc/files.md                               @hebasto
+/doc/gitian-building.md                     @laanwj
+/doc/reduce-memory.md                       @fanquake
+/doc/reduce-traffic.md                      @jonasschnelli
+/doc/release-process.md                     @laanwj
+/doc/translation_strings_policy.md          @laanwj
+
+# Build aux
+/build-aux/m4/bitcoin_qt.m4                 @hebasto
+
+# MSVC build system
+/build_msvc/                                @sipsorcery
+
+# Settings
+/src/util/settings.*                        @ryanofsky
+
+# Fuzzing
+/src/test/fuzz/                             @practicalswift
+/doc/fuzzing.md                             @practicalswift
+
+# Test framework
+/test/functional/mempool_updatefromblock.py @hebasto
+/test/functional/feature_asmap.py           @jonatack
+/test/functional/interface_bitcoin_cli.py   @jonatack
+/test/functional/tool_wallet.py             @jonatack
+
+# Translations
+/src/util/translation.h                     @hebasto
+
+# Dev Tools
+/contrib/devtools/security-check.py         @fanquake
+/contrib/devtools/test-security-check.py    @fanquake
+/contrib/devtools/symbol-check.py           @fanquake
+
+# Gitian/Guix
+/contrib/gitian-build.py                    @hebasto
+/contrib/guix/                              @dongcarl
+
+# Compatibility
+/src/compat/glibc_*                         @fanquake
+
+# GUI
+/src/qt/forms/                              @hebasto
+
+# Wallet
+/src/wallet/                                @achow101
+
+# CLI
+/src/bitcoin-cli.cpp                        @jonatack
+
+# Coinstats
+/src/node/coinstats.*                       @fjahr
+
+# Index
+/src/index/                                 @fjahr
+
+# Descriptors
+*descriptor*                                @achow101 @sipa
+
+# Interfaces
+/src/interfaces/                            @ryanofsky
+
+# DB
+/src/txdb.*                                 @jamesob
+/src/dbwrapper.*                            @jamesob
 
-# Build system maintainer
-/configure.ac         @theuni
-/build-aux/           @theuni
-/depends/             @theuni
-*.am                  @theuni
-Makefile.*            @theuni
+# Scripts/Linter
+*.sh                                        @practicalswift
+/test/lint/                                 @practicalswift
+/test/lint/lint-shell.sh                    @hebasto
 
-# Test framework maintainer
-/src/test/            @marcofalke
-/test/                @marcofalke
-/ci/                  @marcofalke
+# Bech32
+/src/bech32.*                               @sipa
+/src/bench/bech32.*                         @sipa
 
-# GUI maintainer
-/src/qt/              @jonasschnelli
+# PSBT
+/src/psbt*                                  @achow101
+/src/node/psbt*                             @achow101
+/doc/psbt.md                                @achow101
 
-# Wallet maintainer
-/src/wallet/          @meshcollider
+# P2P
+/src/net_processing.*                       @sipa
+/src/protocol.*                             @sipa
 
-# MSVC build system maintainer
-/build_msvc/          @sipsorcery
+# Consensus
+/src/coins.*                                @sipa @jamesob
+/src/script/script.*                        @sipa
+/src/script/interpreter.*                   @sipa
+/src/validation.*                           @sipa
+/src/consensus/                             @sipa